<template>
    <div class="container">
        <div class="news-header" :style="{ backgroundImage: `url(${require('@/assets/夕阳.jpg')})`}">
        </div>

        <div class="search">
            <el-popover placement="bottom" title="检索结果" width="50%" :visible="visable">
                <template #reference>
                    <el-input v-model="searchText" placeholder="输入关键字" :prefix-icon="Search" type="search" size="large"
                        @input="visable = true" @blur="visable = false" />
                </template>
                <div v-if="searchNewsList.length">
                    <div v-for="data in searchNewsList" :key="data._id" class="search-item" @click="handleChangePage(data._id)">{{ data.title }}</div>
                </div>
                <div v-else>
                    <el-empty description="暂无新闻" :image-size="50"></el-empty>
                </div>
            </el-popover>
        </div>

        <div class="topnews">
            <el-row :gutter="20">
                <el-col :span="6" v-for="item in topNewsList" :key="item._id">
                    <el-card style="max-width: 480px" shadow="hover" @click="handleChangePage(item._id)">
                        <div class="image" :style="{ backgroundImage: `url(http://localhost:3000${item.cover})` }">
                        </div>

                        <div style="padding: 14px;float: left;">
                            <span>{{ item.title }}</span>
                            <div class="bottom">
                                <time class="time">{{ selectTime(item.editTime) }}</time>
                            </div>
                        </div>
                    </el-card>
                </el-col>
            </el-row>
        </div>

        <el-tabs v-model="whichTab" class="demo-tabs" style="margin:20px">
            <el-tab-pane :label="item.label" :name="item.name" v-for="item in tabList" :key="item.name">
                <el-row :gutter="20">
                    <el-col :span="18">
                        <div v-for="data in tabnews[item.name]" :key="data._id" style="padding: 10px;">
                            <el-card shadow="hover" @click="handleChangePage(data._id)">
                                <div class="tab-image"
                                    :style="{ backgroundImage: `url(http://localhost:3000${data.cover})` }">
                                </div>

                                <div style="padding: 14px;margin-left: 150px">
                                    <span>{{ data.title }}</span>
                                    <div class="bottom">
                                        <time class="tab-time">{{ selectTime(data.editTime) }}</time>
                                    </div>
                                </div>
                            </el-card>
                        </div>
                    </el-col>

                    <el-col :span="6">
                        <el-timeline>
                            <el-timeline-item v-for="(data, index) in tabnews[item.name]" :key="index"
                                :timestamp="selectTime(data.editTime)">
                                {{ data.title }}
                            </el-timeline-item>
                        </el-timeline>
                    </el-col>
                </el-row>
            </el-tab-pane>
        </el-tabs>

        <el-backtop visibility-height="200"></el-backtop>
    </div>
</template>

<script setup>
import { Search } from '@element-plus/icons-vue'
import { computed, onMounted, ref } from 'vue'
import axios from 'axios'
import moment from 'moment'
import _ from 'lodash'
import { useRouter } from 'vue-router'

moment.locale("zh-cn")
const searchText = ref("")
const visable = ref(false)
const newsList = ref([])
const whichTab = ref(1)

onMounted(async () => {
    var res = await axios.get("/webapi/news/list")
    // console.log(res.data)
    newsList.value = res.data.data
})

const searchNewsList = computed(() => searchText.value ? newsList.value.filter(item => item.title.includes(searchText.value)) : [])
const router = useRouter()
const handleChangePage = (id)=>{
    router.push(`/news/${id}`)
}

const topNewsList = computed(() => newsList.value.slice(0, 4))
const tabList = [
    {
        label: "最新动态",
        name: 1
    },
    {
        label: "典型案例",
        name: 2
    },
    {
        label: "通知公告",
        name: 3
    },
]
const selectTime = time => {
    return moment(time).format("lll")
}

const tabnews = computed(() => _.groupBy(newsList.value, item => item.category))
</script>

<style lang="scss" scoped>
.container {
    position: relative;
}

.news-header {
    width: 100%;
    height: 400px;
    background-size: cover;
}

.search {
    position: absolute;
    top: 300px;
    width: 100%;
    text-align: center;

    .el-input {
        width: 50%;
    }
}

.search-item {
    height: 50px;
    line-height: 50px;

    &:hover {
        color: skyblue;
        background: whitesmoke;
    }
}

.topnews {
    margin: 20px;

    .image {
        width: 100%;
        height: 150px;
        background-size: cover;
    }

    .time {
        font-size: 13px;
        color: gray;
    }
}

.tab-image {
    width: 150px;
    height: 100px;
    background-size: cover;
    float: left;
}

.tab-time {
    font-size: 13px;
    color: gray;
}
</style>